I was joking, @daloon. I don’t edit the type of thing that I would be reading if I were using some product. But I do often wish that somebody had.
Reading to edit (which isn’t reading for structure—I don’t know what that means) is different from reading to learn. I can edit a psychology textbook very capably and yet not be able to ace a test on the content. I don’t try to absorb it, because that’s not my focus, but a lot will rub off. It’s just a different process because it has a different purpose.
I can edit a document without having independent knowledge of the content. It is better that way, in fact, because then I can avoid mentally supplying missing information and can better identify omissions. Yet I still know whether it is logical, orderly, coherent, and internally consistent as well as grammatically correct.